diff --git a/src/web/public/terminal-ui.js b/src/web/public/terminal-ui.js
index cd6ef453..afc03555 100644
--- a/src/web/public/terminal-ui.js
+++ b/src/web/public/terminal-ui.js
@@ -6082,19 +6082,24 @@ Object.assign(CodemanApp.prototype, {
     const session = this.sessions?.get(sessionId);
     const optOut = !!this.loadAppSettingsFromStorage?.()?.terminalWheelLocalScrollback;
     const tracking = this.terminal?.modes?.mouseTrackingMode || 'none';
+    // The encoding xterm would report in (DEFAULT, SGR, SGR_PIXELS): touch
+    // forwards to xterm's own tracking only when it is SGR
+    // (_shouldForwardTouchToApp).
+    const encoding = this.terminal?._core?.coreMouseService?.activeEncoding || 'unknown';
     // xterm's own mode above stays 'none' for a strip mode (the server removes
     // the DECSETs), so the CLI's real tracking state is reported separately.
     const cliTracking = session?.cliMouseTracking === true;
     const baseY = this.terminal?.buffer?.active?.baseY ?? -1;
     const signature =
-      `${decision}|${session?.mode}|${session?.cliVersion}|${optOut}|${tracking}|${cliTracking}|${baseY > 0}`;
+      `${decision}|${session?.mode}|${session?.cliVersion}|${optOut}|` +
+      `${tracking}|${encoding}|${cliTracking}|${baseY > 0}`;
     if (!this._scrollRoutingLogged) this._scrollRoutingLogged = new Map();
     if (this._scrollRoutingLogged.get(sessionId) === signature) return;
     this._scrollRoutingLogged.set(sessionId, signature);
     console.log(
       `[scroll] ${sessionId} → ${decision} (mode=${session?.mode || '?'}, cliVersion=${session?.cliVersion || 'unknown'}, ` +
-        `localScrollbackOptOut=${optOut}, mouseTracking=${tracking}, cliMouseTracking=${cliTracking}, ` +
-        `localScrollbackRows=${baseY})`
+        `localScrollbackOptOut=${optOut}, mouseTracking=${tracking}, mouseEncoding=${encoding}, ` +
+        `cliMouseTracking=${cliTracking}, localScrollbackRows=${baseY})`
     );
   },
 
diff --git a/test/terminal-scroll-routing.test.ts b/test/terminal-scroll-routing.test.ts
index 6293a21c..7fd26e64 100644
--- a/test/terminal-scroll-routing.test.ts
+++ b/test/terminal-scroll-routing.test.ts
@@ -876,6 +876,20 @@ describe('scroll routing diagnostic (issue #205 round 2)', () => {
     app._logScrollRouting('page-keys');
     expect(logs[0]).toContain('cliVersion=unknown');
   });
+
+  it("reports xterm's mouse encoding, the input touch forwarding to native tracking reads", () => {
+    const { app, logs } = hollowApp({ mode: 'shell' });
+    app._logScrollRouting('local-scrollback'); // no readable xterm private
+    expect(logs[0]).toContain('mouseEncoding=unknown');
+
+    // An app switching to SGR changes what touch does, so it prints again.
+    app.terminal.modes.mouseTrackingMode = 'any';
+    app.terminal._core = { coreMouseService: { activeEncoding: 'SGR' } };
+    app._logScrollRouting('local-scrollback');
+    expect(logs).toHaveLength(2);
+    expect(logs[1]).toContain('mouseTracking=any');
+    expect(logs[1]).toContain('mouseEncoding=SGR');
+  });
 });
 
 describe('touch scrolling when xterm owns native mouse tracking', () => {
@@ -898,6 +912,13 @@ describe('touch scrolling when xterm owns native mouse tracking', () => {
     expect(app._shouldForwardTouchToApp()).toBe(false);
   });
 
+  it('does not send cell-based SGR reports to an app that asked for SGR pixel coordinates', () => {
+    const { app } = hollowApp({ mode: 'shell' });
+    app.terminal.modes.mouseTrackingMode = 'any';
+    app.terminal._core = { coreMouseService: { activeEncoding: 'SGR_PIXELS' } };
+    expect(app._shouldForwardTouchToApp()).toBe(false);
+  });
+
   it('keeps the explicit local-history preference for touch', () => {
     const { app } = hollowApp({ mode: 'shell' });
     app.terminal.modes.mouseTrackingMode = 'any';